Block Version History
| Version Number | Proposed In | Released | Summary |
|---|---|---|---|
| Aug 2017 | Bitcoin Cash hard fork. | ||
| 4 | BIP-0065 | Nov 2015 Bitcoin Core 0.11.2 |
Added support for OP_CHECKLOCKTIMEVERIFY opcode. |
| 3 | BIP-0066 | Jul 2015 Bitcoin Core 0.10.0 |
Added enforcement of DER encoding of all ECDSA signatures in new blocks. |
| 2 | BIP-0034 | Sep 2012 Bitcoin Core 0.7.0 |
Added the block height within the block coinbase. |
| 1 | Jan 2009 | The format used in the genesis block. |